Ronaldo is a Portuguese given name equivalent to the English Ronald. It became a common name in all Portuguese-speaking countries, being also prevalent in Italy and Spanish-speaking countries. People. Notable people known as Ronaldo include: Association footballers. Ronaldo (Brazilian footballer), full name Ronaldo Luís Nazário de Lima (born 1976), Brazilian footballer. Cristiano Ronaldo (born 1985), Portuguese footballer. https://en.wikipedia.org/wiki/Ronaldo